Genesis 27:40
"And by thy sword shalt thou live, and shalt serve thy brother; and it shall come to pass when thou shalt have the dominion, that thou shalt break his yoke from off thy neck."
Cross References (ranked by relevance)
And the LORD said unto her, Two nations are in thy womb, and two manner of people shall be separated from thy bowels; and the one people shall be stronger than the other people; and the elder shall serve the younger.
For again the Edomites had come and smitten Judah, and carried away captives.
In his days the Edomites revolted from under the dominion of Judah, and made themselves a king.
So the Edomites revolted from under the hand of Judah unto this day. The same time also did Libnah revolt from under his hand; because he had forsaken the LORD God of his fathers.
And he put garrisons in Edom; throughout all Edom put he garrisons, and all they of Edom became David’s servants. And the LORD preserved David whithersoever he went.
Moab is my washpot; over Edom will I cast out my shoe: Philistia, triumph thou because of me.
Thou hast indeed smitten Edom, and thine heart hath lifted thee up: glory of this, and tarry at home: for why shouldest thou meddle to thy hurt, that thou shouldest fall, even thou, and Judah with thee?
And the messengers returned to Jacob, saying, We came to thy brother Esau, and also he cometh to meet thee, and four hundred men with him.
He slew of Edom in the valley of salt ten thousand, and took Selah by war, and called the name of it Joktheel unto this day.
Think not that I am come to send peace on earth: I came not to send peace, but a sword.